Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1d48ec02652620…

MALICIOUS

PDF

70.0 KB Created: 2021-03-13 23:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7c426fe835b5bc203d2535a1cc154520 SHA-1: b42626db7aa6cb82bb4ec2d104e8c512b127e173 SHA-256: 3d1d48ec0265262059f31781160a0d5525e2c6e30a68f88f5df237bb143a4ad4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/123?utm_term=amlido+rajasthani+dj+song PDF link annotation
    • https://gewujamagig.weebly.com/uploads/1/3/5/3/135339218/03b215.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/41606265216.pdfIn PDF document text
    • http://povar2020.site/casting_crowns_former_membersro5jt.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/kidoligij-nidito.pdfIn PDF document text
    • https://tatasabazenaxaj.weebly.com/uploads/1/3/2/6/132695883/zabibizi-xugosefadu-sizuket-wedegefusotikex.pdfIn PDF document text
    • https://rekinijibir.weebly.com/uploads/1/3/2/3/132302710/b601ffdac8e5.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/pusowipopufejujogu.pdfIn PDF document text
    • https://gikanusubidi.weebly.com/uploads/1/3/4/7/134756500/wikisuso.pdfIn PDF document text
    • https://xupugafowepeg.weebly.com/uploads/1/3/0/8/130814457/fekuxigedozivuwuz.pdfIn PDF document text
    • https://bofisolipog.weebly.com/uploads/1/3/4/4/134438855/midinakijizotexiju.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/6799454.pdfIn PDF document text
    • https://wonakusoxenim.weebly.com/uploads/1/3/5/3/135340368/2016802.pdfIn PDF document text
    • https://wesafave.weebly.com/uploads/1/3/4/3/134307961/ab91a8f.pdfIn PDF document text
    • https://xexumure.weebly.com/uploads/1/3/4/8/134885566/xotesegonuz.pdfIn PDF document text
    • http://profapp.pro/dejamuterodararoze8thjk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/likerajatob/guest_relation_interview_questions_and_answers.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/72996977234.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/81637482306.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/paradise_lost_full_poem.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/zulunoru.pdfIn PDF document text
    • http://zavulelobawabi.onlinewebshop.net/56376551108.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/on_my_honor_book_read_aloud.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C4 5304 bytes
SHA-256: 14c4e9c727536de8dca85d3bbb153046b6b8b3f77ce02ad22822d80c88cf9f6e
font_01_sfnt_off0000e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 10612 bytes
SHA-256: 20878e5181f8e5f3663e1ffbdd743f06bf1c119a3a0238a43e2495823b28c0e7